 Usage:  nar = haznar(data)  

 

 Input:



  data                   n x (p+4) matrix, 

                         column 1: the sorted observed survival time t, 

                         column 2: the cosorted censoring indicator delta, 

                         column 3: labels l, 

                         column 4: number of ties at time t[i], cosorted, 

                         columns 5 to p+4: the cosorted covariate matrix z. 

                         

 Output:



  nar                    n x 1 vector, the ith entry is the size of the 

                         risk set at time t_i. 

                         

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(C) MD*TECH Method and Data Technologies, 21.9.2000

